In the information request response, a spokeswoman for the library authority said they operate a consistent policy of charges for overdue items across all its libraries.

Under current policies, library members are charged 10 pence for every day a borrowed book is overdue, up to a maximum charge of £5 per book.

Other library services, such as photocopying, DVD rental and internet access, have varied charges.

Explaining the charges, a spokeswoman said: “Library members can borrow books, audio books and language courses free of charge. The loan period for books and audio books is three weeks. The loan period for language courses is six weeks. CDs and DVDs are hired on a weekly basis. Maximum charges are set for the late return of items.

“Libraries NI reviews its charges for the late return and hire of items annually. When a borrower has accumulated £10 of outstanding charges they are prevented from using the full range of library services until the account is reduced to below this amount.”

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